基于双极性二维晶体的新型p-n结

Novel p-n junctions based on ambipolar two-dimensional crystals

二维晶体的特殊结构和新奇物理性能为构建新型纳米结构和器件,实现半导体领域的突破性进展提供了可能.本文首先介绍了双极性二维晶体的基本物理性能和相关范德瓦耳斯异质结的制备方法.在此基础上,主要综述了双极性二维晶体在新型电场调制二维晶体p-n结与异质p-n结以及非易失性可存储二维晶体p-n结等方面的应用、相关结构设计、电子和光电子等物理性能.然后进一步介绍了该类新型p-n结在逻辑整流电路、场效应光电子晶体管、多模式非易失性存储器、整流存储器、光电子存储器、光伏器件等方面的潜在应用.最后总结展望了该种新型p-n结在相关领域的可能发展方向.

Two-dimensional（2 D） materials have a unique crystal structure and excellent properties, which renders it possible to be used to construct novel artificial nanostructures and design novel nanodevices, thereby achieving a breakthrough in the semiconductor field. In this review paper, the basic behaviors of the ambipolar 2 D crystals and the fabrication method of the van der Waals heterostructures are first introduced. We mainly summarize the applications of the ambipolar 2 D crystals for novel electrical-field-tunable 2 D p-n junctions and p-n heterojunctions（field-effect p-n heterojunction transistor） and non-volatile storable p-n junctions, and other aspects of the relevant structural design, electronic and optoelectronic properties. Then we further introduce their potential applications of logic rectifiers, field-effect optoelectronic transistors, multi-mode non-volatile memories, rectifier memories, optoelectronic memories, photovoltaics, etc.Finally, we provide an outlook of the future possible studies of this new type of p-n junctions in the relevant fields.